UBUNTU-CVE-2023-20585

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    UBUNTU-CVE-2023-20585

    Published: 16 Apr 2026Last Modified: 6 Nov 2026
    Upstream:
    CVE-2023-20585
    Aliases:
    USN-8887-1
    USN-8887-2
    USN-8887-3

    Summary:

    Details: Insufficient checks of the RMP on host buffer access in IOMMU may allow an attacker with privileges and a compromised hypervisor to trigger an out of bounds condition without RMP checks, resulting in a potential loss of confidential guest integrity.

    References: https://ubuntu.com/security/CVE-2023-20585, https://www.cve.org/CVERecord?id=CVE-2023-20585, https://lore.kernel.org/linux-iommu/[email protected]/, https://www.amd.com/en/resources/product-security/bulletin/amd-sb-3016.html, https://ubuntu.com/security/notices/USN-8888-1, https://ubuntu.com/security/notices/USN-8889-1, https://ubuntu.com/security/notices/USN-8887-1, https://ubuntu.com/security/notices/USN-8888-2, https://ubuntu.com/security/notices/USN-8887-2, https://ubuntu.com/security/notices/USN-8887-3, https://ubuntu.com/security/notices/USN-8917-1, https://ubuntu.com/security/notices/USN-8918-1, https://ubuntu.com/security/notices/USN-9003-1

    Affected packages

    Package

    Name: linux-hwe-edge

    Purl: pkg:deb/ubuntu/linux-hwe-edge?arch=source&distro=xenial

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0
    Fixed -None

    Affected versions

    4.8.0-28.30~16.04.1
    4.8.0-30.32~16.04.1
    4.8.0-32.34~16.04.1
    4.8.0-34.36~16.04.1

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High
    UBUNTU-CVE-2023-20585 | CVE-DB